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    Subject[PATCH AUTOSEL 5.4 04/73] drm/lima: fix warning when CONFIG_DEBUG_SG=y & CONFIG_DMA_API_DEBUG=y
    Date
    From: Qiang Yu <yuq825@gmail.com>

    [ Upstream commit 89636a06fa2ee7826a19c39c19a9bc99ab9340a9 ]

    Otherwise get following warning:

    DMA-API: lima 1c40000.gpu: mapping sg segment longer than device claims to support [len=4149248] [max=65536]

    See: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5496

    Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
    Reported-by: Roman Stratiienko <r.stratiienko@gmail.com>
    Signed-off-by: Qiang Yu <yuq825@gmail.com>
    Link: https://patchwork.freedesktop.org/patch/msgid/20211031041604.187216-1-yuq825@gmail.com
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/gpu/drm/lima/lima_device.c | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/drivers/gpu/drm/lima/lima_device.c b/drivers/gpu/drm/lima/lima_device.c
    index d86b8d81a483a..155971c57b2d5 100644
    --- a/drivers/gpu/drm/lima/lima_device.c
    +++ b/drivers/gpu/drm/lima/lima_device.c
    @@ -293,6 +293,7 @@ int lima_device_init(struct lima_device *ldev)
    struct resource *res;

    dma_set_coherent_mask(ldev->dev, DMA_BIT_MASK(32));
    + dma_set_max_seg_size(ldev->dev, UINT_MAX);

    err = lima_clk_init(ldev);
    if (err)
    --
    2.34.1
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